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2008-06-17 by Zack Widup
Me too. I usually turn the internal WDT off. Zack On Tue, 17 Jun 2008, Dennis Clark wrote: > >> Don't AVRs have a WatchDogTimer? >> >> This is used to ensure that a processor hasn't gone off into a bad >> place. If your software doesn't "service" the Watchdog Timer, the >>
2008-06-17 by Dennis Clark
> Don't AVRs have a WatchDogTimer? > > This is used to ensure that a processor hasn't gone off into a bad > place. If your software doesn't "service" the Watchdog Timer, the > processor will go into a reset condition. > Yes, they do. I prefer external hardware watchdogs mys
2008-06-17 by charlieknox
Steve - thank you for your info on these two. What are some applications you've used these in? I'm a newbie, just starting to learn, and I appreciate these hardware insights and experiences. Would you ever drive the 2804 directly from a uC output pin? If you can discuss the use o
2008-06-17 by David Appleton
Don't AVRs have a WatchDogTimer? This is used to ensure that a processor hasn't gone off into a bad place. If your software doesn't "service" the Watchdog Timer, the processor will go into a reset condition. [Non-text portions of this message have been removed]
2008-06-17 by Jim Ronald
Also, the open source community has embraced the AVR, including compilers, libraries, programming hardware and software and many projects. ----- Original Message ----- From: Roy E. Burrage To: AVR-Chat@yahoogroups.com Sent: Monday, June 16, 2008 6:56 PM Subject: Re: [AVR-Chat] AV
2008-06-17 by Steven Hodge
I use IRF2804's to switch various current loads up to 50 A, using a Micrel 5014 (or 5015) driver. The driver can be easily controlled with a signal directly from the uC. The control threshold is about 2 V. The 2804's have a really low on-resistance, only 2 milli-ohms, and I don't
2008-06-16 by Roy E. Burrage
Cost of tools - AVRs cost significantly less to get started, including a development board, than the PICs any day ... and this is for commercially available, high quality development tools. Clock cycles per instruction cycle - not a big hairy deal at high frequencies and slow mac
2008-06-16 by John Samperi
At 07:32 AM 17/06/2008, you wrote: >The AVR feature set on the part >I used is pretty much available on a PIC with small differences. Like a memory map that looks like Swiss cheese for the Pic? :-) And if it were made of Swiss cheese would not be enough for a mouse. Lets see 16F8
2008-06-16 by Philippe Habib
I'll admit that I mostly use PICs and my only use of the AVR was due to a client requirement. That said, I didn't find any real reasons to hugely favor one over the other. The AVR feature set on the part I used is pretty much available on a PIC with small differences. Price was a
2008-06-16 by John Samperi
At 02:48 AM 17/06/2008, you wrote: >I'm really curious about what it is that gives you doubts. He works for Microchip??? Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel
2008-06-16 by John Johnson
Which power semiconductors (MOSFET, IGBT, bipolar) ? How much power (volts, amps, AC, DC) ? What kind of load (resistive (lights, heaters), inductive (motors, relays), capacitive (bigger semiconductors)) ? How fast (2 times a day, 1 000 000 times per second) ? etc. For a DC load
2008-06-16 by Philippe Habib
I'm really curious about what it is that gives you doubts. Could you explain what it is that leads you to question using the AVRs? -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of mooodij Sent: Friday, June 13, 2008 4:11 AM
2008-06-16 by Enki
It's more than seven years I'm using Atmel AVR in automation projects without any problems. Mark Jordan On 13 Jun 2008 at 11:11, mooodij wrote: > Its more than a year that Im using AVRs in order to use them in my > projects. > But now Im in doubt are they really suitable & comfor
2008-06-15 by Raymond Hurst
Nope. That was what I was going to do when I got back to it. Ray Qboll wrote: > > > Hi Raymond, > > Do you have a information of how to read a BSD file? > I also found these files for the avr but I don't know how to read it. > > Thanks, > Pascal > > > -----Original Message----- >
2008-06-15 by Qboll
Hi Raymond, Do you have a information of how to read a BSD file? I also found these files for the avr but I don't know how to read it. Thanks, Pascal -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of Raymond Hurst Sent: 14 Ju
2008-06-15 by mooodij
hi everybody could anybody help me to know how to switch power semiconductors by AVRs???
2008-06-14 by Raymond Hurst
I downloaded some BSD files from the Atmel website a while back. I haven't had time to look at them. Let me know ig that's what you're looking for. Ray Qboll wrote: > > > Hi All, > > I want to do a boundaryscan test with my AVR project in production. > Does anyone have/know a too
2008-06-13 by paul sinclair
i tried this with mine. But it has to be the usb version. SO back to the drawing board for me. I might need to invest in a proper development board :( Paul. On Wed, Jun 11, 2008 at 11:36 PM, Gavin Dingley wrote: > Hi Paul, > I have not tried this yet, but I have the USB board - m
2008-06-13 by mooodij
Its more than a year that Im using AVRs in order to use them in my projects. But now Im in doubt are they really suitable & comfortable for automation projects??? are they really trustable for this purpose??? Ill be gratify if somebody do me a favor & guide me about these .
2008-06-12 by Qboll
Hi All, I want to do a boundaryscan test with my AVR project in production. Does anyone have/know a tool to generate a SVF file where I can toggle I/O pins? (access boundryscan cells) I googled already a few hours but I didn't found it. I have already a JTAG SVF file player. Prog
2008-06-12 by John Johnson
Thanks Cat & Tim, > The internal oscillator was enabled! Apparently if the reset went wrong in just the right way, it would use the external oscillator I have connected. That is why 7372800Hz / 256 / 64 = 70Hz ! Thanks again for the support. Regards, JJ On Wed, Jun 11, 2008 at 3:
2008-06-11 by paul sinclair
aha, i see. Im still waiting on avr studio to download. i downloaded the wrong one first. i just wasted another two hours of my life on http://icanhascheezburger.com/ Ahh, the joy of the internet. its hard to get out of my procrastination habbit! Paul. On Wed, Jun 11, 2008 at 11:
2008-06-11 by Gavin Dingley
Hi Paul, I have not tried this yet, but I have the USB board - mySmartUSB, not a printer parallel port version (didn't know there was one). The document is at: http://www.myavr.info/download/techb_mysmartusb.pdf see page 11 for details for using it with AVR studio. A such you sel
2008-06-11 by paul sinclair
Gavin, just went to try this now. Are you using the LPT programmer, or the usb programmer? Paul. [Non-text portions of this message have been removed]
2008-06-11 by paul sinclair
hi Gavin, hmm, i might take a look at that. i only recently got a cable for it. and i really want to start programming it. So this might be the motivation i need. Cheers, Paul EI5GTB On Tue, Jun 10, 2008 at 12:49 PM, dingley76 wrote: > Hi, > This is an old topic, but I have also
2008-06-11 by Tim Mitchell
Hello John, I suggest you post your actual code in case someone can spot the problem - I have lost count of the times that my actual code is not the same as the code I thought I had written! -- Tim Mitchell tim@sabretechnology.co.uk http://www.sabretechnology.co.uk Sabre Technolo
2008-06-11 by Cat Hotmail
I might be wrong, but I don't trust solderless breadboards. I wouldn't think of trying anything on one but the simplest DC (or so) circuit. Too many uncertainties... I would try prototype board instead. Good luck Cat ... > As far as hardware, it's on a solderless breadboard. I've
2008-06-10 by dingley76
Hi, This is an old topic, but I have also purchased the MyAVR programmer board and was also disappointed by the fact that the accompanying software was in German. I have not tried the board yet (I haven't really got into AVR programming yet!), but looking at the documentation it
2008-06-10 by Robert Adsett
At 12:49 AM 6/10/2008 +0000, Graham Davies wrote: >David Kelly wrote: > > Volatile informs the compiler that > > the object may change between the > > compiler's uses ... And when changing > > the value it must write it out > > immediately. And not merge the access > > across mul
2008-06-09 by Graham Davies
David Kelly wrote: > Volatile informs the compiler that > the object may change between the > compiler's uses ... And when changing > the value it must write it out > immediately. And not merge the access > across multiple statements. then, Robert Adsett wrote: > What it actually
2008-06-09 by John Johnson
Hello All, I'm glad you all, and this group, are here. I hope I will be able to contribute to this group myself. I'm working on a small project to keep our coffee pots from boiling dry at the office. I'm using an AT90S2343-10PU (I think it's a PU) that I have left over from previ
2008-06-09 by Robert Adsett
At 07:36 PM 6/8/2008 -0500, David Kelly wrote: >On Jun 8, 2008, at 7:00 PM, Cat Hotmail wrote: > > > I'm not sure of all that "volatile" does (I know I need it for > > variables > > that I use both in interrupts and out). > > >Volatile informs the compiler that the object may cha
2008-06-09 by Cat Hotmail
Thanks David, that's helpful. All the best, Cat -------------------------------------------------- From: "David Kelly" Sent: Sunday, June 08, 2008 6:36 PM To: Subject: Re: [AVR-Chat] AvrStudio4 (2008), WinAVR (2007-05...) and Dragon problem debugging C code (jtag) > > On Jun 8, 2
2008-06-09 by David Kelly
On Jun 8, 2008, at 7:00 PM, Cat Hotmail wrote: > I'm not sure of all that "volatile" does (I know I need it for > variables > that I use both in interrupts and out). Volatile informs the compiler that the object may change between the compiler's uses. Therefore the compiler has t
2008-06-09 by Cat Hotmail
Thanks Kelly, I'm not sure of all that "volatile" does (I know I need it for variables that I use both in interrupts and out). The lines may have been executed, but it's very... not nice when 10 XOR 00 = 00 because another line has been executed without me knowing. I may turn opt
2008-06-08 by David Kelly
On Jun 7, 2008, at 5:13 PM, Cat Hotmail wrote: > I'm having this weird problem whereby I am able to debug, and to step > through the program, but it just ignores/skips some of the lines. As you have found when -Os is changed to -O0 all your "lines" appear as expected in the debug
2008-06-08 by John Samperi
At 09:15 AM 8/06/2008, you wrote: >Secondly, the compiler defaults to maximum optomization, which would >seem to be >a poor choice since most projects surely start in the debug phase! In the avrfreaks.net site, home of winAvr, it has been claimed the opposite by people "who know"
2008-06-08 by Cat Hotmail
Thank David, it works good now. Cat -------------------------------------------------- From: Sent: Saturday, June 07, 2008 5:15 PM To: Subject: Re: [AVR-Chat] AvrStudio4 (2008), WinAVR (2007-05...) and Dragon problem debugging C code (jtag) > Cat- > > Yes, I have had the same pro
2008-06-07 by dpharris@telus.net
Cat- Yes, I have had the same problem. I wish someone in the know would comment. Firstly, the compiler appears to optimize out pieces of code that are required, and without so much as a warning. It is possible that the compiler move the your setting of iStepX etc further on in th
2008-06-07 by Cat Hotmail
Hmmm, I think I figured it out: It was the optimization setting. I changed it to "0" and now my lines... work :-) Cat -------------------------------------------------- From: "Cat Hotmail" Sent: Saturday, June 07, 2008 4:13 PM To: Subject: [AVR-Chat] AvrStudio4 (2008), WinAVR (20
2008-06-07 by Cat Hotmail
Hi, I'm having this weird problem whereby I am able to debug, and to step through the program, but it just ignores/skips some of the lines. In the code below, I'll show the skipped lines with \\ #include #include volatile uint8_t iMotorPosition[9] = {0, 0b110110, 0b100110, 0b1101
2008-06-06 by John Samperi
At 10:42 AM 6/06/2008, Graham Davies wrote: >I don't think there is on-chip debug on the >ATmega8535, so an AVR Dragon won't buy you anything. OOPS... but it will be useful once he moves up to Mega164p etc. or even Tinyes with DW. Regards John Samperi ****************************
2008-06-05 by Graham Davies
--- In AVR-Chat@yahoogroups.com, John Samperi wrote: > [An AVR Dragon] will be useful once > he moves up to Mega164p etc. > or even Tinyes with DW. Absolutely. It's always on the tip of my tongue to yell "No! That one has no on-chip debug! Throw it away!", but I know that some pe
2008-06-05 by Graham Davies
--- In AVR-Chat@yahoogroups.com, "Riccardo Castellani" wrote: > What do you suggest me to start ? > ... on stk500 board or directly > building simple circuit with > breadboard using ISP programmer ? > Other suggestions please ? As John says, the STK500 will be a good start. If yo
2008-06-05 by John Samperi
At 06:02 AM 5/06/2008, you wrote: >1- to having experience on stk500 board or directly building simple circuit >with breadboard using ISP programmer ? The STK500 is a good tool to start off with, especially if you don't have a lot of experience in bread boarding. You may need a m
2008-06-04 by Riccardo Castellani
I have both AVR STK-500 board and AVR ISP mkII in-system programmer. I know some electronic science, C language but no microcontrollers. Now I'm reading AVR book "programming, customizing AVr microcontrollers" which I bought in Amazon. I'm going to use AT-Mega8535 chip. My idea i
2008-06-04 by Riccardo Castellani
I have both AVR STK-500 board and AVR ISP mkII in-system programmer. I know some electronic science, C language but no microcontrollers. Now I'm reading AVR book "programming, customizing AVr microcontrollers" which I bought in Amazon. I'm going to use AT-Mega8535 chip. My idea i
2008-06-03 by Bruce Parham
Tim Mitchell wrote: > Hello folks, we are designing an AVR-based device which uses a graphical > LCD, and the Ramtex graphics library software. This can import truetype > fonts for use on the device, but warns that doing so may infringe the > font copyright. We are working with s
2008-06-03 by Tim Mitchell
Zack Widup wrote: > I have never done anything with microcontrollers regarding setting or > changing fonts, but isn't the font actually set by the LCD or the > graphics library software? I.e. if you want Bodoni bold,don't you > just select a number somewhere that signifies this f
2008-06-03 by Zack Widup
I have never done anything with microcontrollers regarding setting or changing fonts, but isn't the font actually set by the LCD or the graphics library software? I.e. if you want Bodoni bold,don't you just select a number somewhere that signifies this font? Or do you actuallyhav